London Telegraph 
February 9, 2012
All dogs may have to be fitted with microchips under government plans to encourage “responsible” pet ownership.
Ministers signalled plans to make microchips compulsory in response to growing concern about dog attacks.
Last year, a survey suggested there are about 8.30million dogs in Britain.
More than half have microchips implanted in their bodies, allowing them to be electronically identified and their owners traced.
England’s laws on dogs are coming under growing pressure because of concern about unchipped and dangerous dogs being used as weapons and status symbols.
Groups including the RSPCA have called for compulsory microchipping to create a clear link between all dogs and their owners.